Organic Particle Production from the Bubbler and Sea Sweep

During CalNex 2010 Amanda Frossard, Lynn Russell,

Scripps Institution of Oceanography, UC San DiegoWilliam Keene, John Maben,

Department of Environmental Science, University of VirginiaTimothy Bates, and Patricia Quinn

Pacific Marine Environmental Laboratory, NOAA

January 12, 2011 - CalNex Data Meeting

Overview• Comparison of marine organic particle

composition from the UVa Bubbler, Sea Sweep, and Ambient Marine Factor

Overview• Comparison of marine organic particle

composition from the UVa Bubbler, Sea Sweep, and Ambient Marine Factor

Methods

• Fourier transform Infrared (FTIR) spectroscopy of filter samples to get overall organic mass and functional groups

• Scanning transmission x-ray microscopy near edge absorption fine structure (STXM-NEXAFS) to get morphology and composition of single particles impacted on sample windows

Nascent Marine Aerosol from Bubbling Ambient Sea Water

Marine Aerosol Production: Bubbler

Vacuum Pump

Bubbler Outlet

1 pair of Teflon filters

Sampled at 80% RHNo diameter size cut“Bulk aerosol”

sub and super micrcon

Organic Composition: Bubbler

Organic Composition:

Bubbler

Northern CA

Southern CA

Bubbling CharacteristicsFine Coarse Jets

Morning

Afternoon

Night

3.43.2 1.7 1.94.2 2.6

Southern CANorthern CASan Francisco Bay

frit typeflow (lpm)

= phenol

Marine Aerosol Production: Sea Sweep

Organic Aerosol Sampling: Sea Sweep and Ambient

Mass Flow Meter and ControllerTotal: 16.8 lpm

Vacuum Pump

PM1 Cyclone

2 pairs of Teflon filters

Dried to 55% RH

Organic Composition: Sea SweepNorthern CA

Southern CA

Single Particle Sea SweepParticle Map

Hawkins et al. 2010

High C

Low C

Single Particle Sea SweepParticle Map

Hawkins et al. 2010

High C

Low C

Organic Composition: Ambient

Ambient Marine Aerosol

Russell et al. 2010

Marine FactorAlcohol: 62%Acid: 9%Alkane: 20%Amine: 9%

Makes up on average 13% of total OM

Similar to marine insoluble organicstandards

Ambient Marine Aerosol

• Marine Factor fraction of OM

Single Particle Ambient MarineParticle Map

Hawkins et al. 2010

High C

Low C

Summary

• Sea sweep, bubbler, and ambient marine factor show similar organic functional group composition

• Single particles from the Sea Sweep and clean marine samples have particle morphologies and absorption spectra similar to other observed marine particle

Thanks!

Acknowledgements:• Scientists and crew of R/V Atlantis• Crew at the LBNL Beamline • PMEL Atlantis Group• Russell Group• PNNL Group and Dan Czizco